A community is a location for putting your content... you can put the post on your own blog if you want or in a community... however every community is OWNED and may have rules for using their location.
My tip is to find a community that relates to the topic of your post OR just put it on your blog.
thanks for your advice.
Which community you advice for the next time?
The Constellation is a community life competence outside the blockchain, working in the real world for long time